The intention of this paper is to give direct and converse results on weighted simultaneous approximationby means of Szsz-Kantorovich operators and Baskakov-Kan
In this paper, we study the characterization of f-Chebyshev radius and f-Chebyshev centers and the existence of f-Chebyshev centers in locally convex spaces.
For an analytic function f on the hyperbolic domain Ω in C,the following conclusions are obtained:(i)f∈B(Ω)=BMOA(Ω,m)if and only if Ref∈B(?)(Ω)=BMOH(Ω,m)
We investigate the following problem in this paper: where there is an unique 1-periodic discretequadratic spline s∈S(3, p, h) satisfying certain interpolatory
This paper establishes the following pointwise result for simultancous Lagrange imterpolating approxima-tion:then|f<sup>k</sup>(x)-P<sub>n</sub><sup>k</sup>(f,x)|=O
In this note,we develop,without assuming the Haar condition,a generalized simultaneousChebyshev approximation theory which is similar to the classical Chebyshev